Germanwings crash: Not the full story?

When I heard about the crash of Germanwings Flight GWI9525 in the French Alps on the morning of March 24th, I was shocked, but to be honest, not that shocked. It's not that I expected it to happen, but this was the fifth such incident in the last year. If that frequency is maintained, the statistically-very-low chances of meeting an untimely end on a commercial flight will have to be recalculated.

In the immediate aftermath of the crash I, like many others around the world, waited patiently for the details. What could possibly cause a modern, albeit a little aged, first-generation Airbus A320 to suddenly drop out of the sky and slam into a mountain side? I had a few theories, among them the incapacitating effects of an 'EMP' from an exploding overhead space rock. The shocking rise in fireball/meteorite sightings over the past 10 years makes this plausible, and might well have been the cause of the crash of AF447 into the South Atlantic ocean in 2009. But I waited, and I expected to wait because investigations of this sort can, and should, take quite a while to complete.